Fix gratuitous $ sign breaking an error message
Remove default ROOTPW
Allow setting mfsbsd.rootpwhash in loader.conf
Unset mfsbsd.rootpw and mfsbsd.rootpwhash on boot
Document mfsbsd.rootpwhash and add ChangeLog entry
Replace characters '$' with '%' in mfsbsd.rootpwhash
allow user to override MFSROOT_FREE_*

when you add many files to mfsroot, you need to bump these values.
Merge pull request #20 from reallyenglish/allow_to_override_inodes_and_blocks

allow user to override MFSROOT_FREE_*
Merge remote-tracking branch 'upstream/master'